explain select c_last_name,c_first_name,substr(s_city,1,30) sub,ss_ticket_number,amt,profit from (select ss_ticket_number ,ss_customer_sk ,store.s_city ,sum(ss_coupon_amt) amt ,sum(ss_net_profit) profit from store_sales,date_dim,store,household_demographics where store_sales.ss_sold_date_sk = date_dim.d_date_sk and store_sales.ss_store_sk = store.s_store_sk and store_sales.ss_hdemo_sk = household_demographics.hd_demo_sk and (household_demographics.hd_dep_count = 8 or household_demographics.hd_vehicle_count > 0) and date_dim.d_dow = 1 and date_dim.d_year in (1998,1998+1,1998+2) and store.s_number_employees between 200 and 295 group by ss_ticket_number,ss_customer_sk,ss_addr_sk,store.s_city) ms,customer where ms.ss_customer_sk = customer.c_customer_sk order by c_last_name,c_first_name,sub, profit limit 100;
